The structural and electrical properties of polycrystalline La_0.8Ca_0.17Ag_0.03MnO₃ manganites

In this paper, the authors report the electrical properties of polycrystalline La_0.8Ca_0.17Ag_0.03MnO₃ manganites synthesized using sol-gel method. The X-ray diffraction (XRD) patterns of polycrystalline La_0.8Ca_0.17Ag_0.03MnO₃ samples reveal an orthorhombic perovskite structure with Pnma space group. Analysis using energy dispersive X-ray (EDX) confirms that the sample contains all expected chemical elements without any additional impurity. The measurement of resistivity versus temperature using cryogenic magnetometer was performed to investigate the electrical properties. The results show that the electrical resistivity of polycrystalline La_0.8Ca_0.17Ag_0.03MnO₃ exhibits metalic behavior below 244 K. The temperature dependence of electrical resistivity dominantly emanates from electron-electron scattering and the grain/domain boundary play a important role in conduction mechanism in polycrystalline La_0.8Ca_0.17Ag_0.03MnO₃.